• JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
 
  Bookmark and Share
 
 
Tesis Doctoral
DOI
https://doi.org/10.11606/T.3.2019.tde-15042019-114250
Documento
Autor
Nombre completo
Herbert Prince Favero Pinto
Dirección Electrónica
Instituto/Escuela/Facultad
Área de Conocimiento
Fecha de Defensa
Publicación
São Paulo, 2018
Director
Tribunal
Neiva, Augusto Camara (Presidente)
Appoloni, Carlos Roberto
Coelho, Antonio Carlos Vieira
Rizzo, Marcia de Mathias
Rizzutto, Marcia de Almeida
Título en portugués
Procedimentos para análises em EDXRF - aplicação para análise de metais pesados em solos.
Palabras clave en portugués
Aço
EDXRF
Metais pesados
Rejeitos de mineração
Solos
Resumen en portugués
O trabalho apresenta procedimentos e resultados referentes à análise de solos, rejeitos ferrosos de origem mínero-metalúrgica, ligas ferrosas e minérios ferrosos por espectroscopia de fluorescência de raios X com dispersão de energia (EDXRF), com vistas especialmente à identificação e quantificação de metais pesados em ensaios realizados com equipamento portátil. Para solos e lamas, foram realizados estudos com e sem o recurso de adições de padrões internos. Em ambos os casos, foram ignorados os teores de elementos leves importantes como alumínio e silício. Sem a adição de padrões internos, não se obtiveram resultados absolutos, e os teores dos elementos claramente identificados eram expressos de modo relativo. Com a adição de padrões internos, foi possível expressar os teores daqueles elementos como valores absolutos. Para a análise de ligas ferrosas e minérios, utilizou-se o recurso da fluorescência secundária com alvo de ferro, para aumentar a excitação dos elementos mais leves que o ferro e diminuir a intensidade dos picos de escape da família Fe-K. Com este recurso, obteve-se uma elevada correlação entre as áreas dos picos destes elementos e seus teores nominais. Para determinação dos elementos mais pesados que o ferro, utilizou-se o feixe direto. Foi elaborada metodologia para conciliar os resultados obtidos com feixe direto e os obtidos com fluorescência secundária, obtendo-se uma boa aderência aos valores dos teores nominais. Complementarmente o trabalho apresenta uma forma alternativa de estimar erros quantitativos, baseando-se em simulações de espectros, e traz uma forma de visualizar o espectro sob o domínio da frequência para encontrar e remover ruído.
Título en inglés
Procedures for analysis in EDXRF: application for analysis of heavy metals in soils.
Palabras clave en inglés
EDXRF
Heavy metals in soils
Steels
X-ray fluorescence spectroscopy
Resumen en inglés
The work presents procedures and results concerning the analysis of soils, ferrous wastes of mineral-metallurgical origin, ferrous alloys and ferrous minerals by Energy-Dispersive X-ray Fluorescence spectroscopy (EDXRF), with a special focus on the identification and quantification of heavy metals in tests performed with portable equipment. For soils and sludges, studies were carried out with and without the use of additions of internal standards. In both cases, the contents of important light elements such as aluminum and silicon were ignored. Without the addition of internal standards, no absolute results were obtained, and the contents of the clearly identified elements were expressed in relative terms. With the addition of internal standards, it was possible to express the contents of these elements as absolute values. For the analysis of ferrous alloys and ores, the secondary fluorescence with iron target was used to increase the excitation of lighter elements than iron and to reduce the intensity of the escape peaks of the Fe-K family. With this feature, a high correlation was obtained between the areas of the peaks of these elements and their nominal contents. To determine the elements heavier than iron, the direct beam was used. A methodology was developed to reconcile the results obtained with direct beam and those obtained with secondary fluorescence, obtaining a good adhesion to the values of the nominal values. In addition, the work presents an alternative way of estimating quantitative errors, based on spectra simulations, and provides a way to visualize the spectrum under the frequency domain to find and remove noise.
 
ADVERTENCIA - La consulta de este documento queda condicionada a la aceptación de las siguientes condiciones de uso:
Este documento es únicamente para usos privados enmarcados en actividades de investigación y docencia. No se autoriza su reproducción con finalidades de lucro. Esta reserva de derechos afecta tanto los datos del documento como a sus contenidos. En la utilización o cita de partes del documento es obligado indicar el nombre de la persona autora.
Fecha de Publicación
2019-04-16
 
ADVERTENCIA: El material descrito abajo se refiere a los trabajos derivados de esta tesis o disertación. El contenido de estos documentos es responsabilidad del autor de la tesis o disertación.
  • CAMPOS, P.H.O.V., et al. X-ray Fluorescence and Imaging Analyses of Paintings by the Brazilian Artist Oscar Pereira Da Silva [doi:10.1016/j.radphyschem.2013.05.029]. Radiation Physics and Chemistry (1993) [online], 2013, vol. 1, p. 1.
  • NEIVA, A. C., et al. Analysis of photographs and photo-paintings by energy-dispersive x-ray fluorescence spectroscopy. Radiation Physics and Chemistry (1993), 2013.
  • NEIVA, A. C., Pinto, H P F, and LANDGRAF, F. J. G. Evaluating the presence of titanium in xix-century brazilian steels by energy-dispersive x-ray fluorescence. Radiation Physics and Chemistry (1993), 2013.
  • NEIVA, AUGUSTO CAMARA, et al. Analysis of photographs and photo-paintings by energy-dispersive X-ray fluorescence spectroscopy [doi:10.1016/j.radphyschem.2013.03.028]. Radiation Physics and Chemistry (1993) [online], 2013, vol. 1, p. 1.
  • NEIVA, AUGUSTO CAMARA, PINTO, HERBERT PRINCE FAVERO, and LANDGRAF, FERNANDO JOSÉ GOMES. Evaluating the presence of titanium in XIX-century Brazilian steels by energy-dispersive X-ray fluorescence [doi:10.1016/j.radphyschem.2013.03.015]. Radiation Physics and Chemistry (1993) [online], 2013, vol. 1, p. 1.
  • CAMPOS, P. H. O. V., et al. Infrared and XRF analysis of a painting of the Brazilian artist Oscar Pereira da Silva. In LASMAC-2011 - 3rd Latin-American Symposium on Physical and Chemical Methods in Archaeology, Art and Cultural Heritage Conservation, Lima, 2011. Book of abstracs.Lima : Universidad Nacional Mayor de San Marcos, 2011. Resumo.
  • KAJYIA, E., et al. Image and EDXRF analysis of XIX-Century Brazilian paintings at the Pinacoteca do Estado de São Paulo. In LASMAC-2011 - 3rd Latin-American Symposium on Physical and Chemical Methods in Archaeology, Art and Cultural Heritage Conservation, Lima, 2011. Book of abstracs.Lima : Universidad Nacional Mayor de San Marcos, 2011. Resumo.
  • KAJYIA, E., et al. X ray fluorescence and images analysis of paintings of the Brazilian artist Oscar Pereira da Silva. In 2012 International Symposium on Radiation Physics - ISRP 2012, Rio, 2012. Proceedings of the 2012 International Symposium on Radiation Physics.Rio : International Radiation Physics Society, 2012. Resumo.
  • NEIVA, A. C., et al. Analysis of ceramic pieces of the Instituto Portucale collection by energy-dispersive x-ray fluorescence spectroscopy. In 2012 International Symposium on radiation Physics - ISRP 2012, Rio, 2012. Proceedings of the 2012 International Symposium on Radiation Physics.Rio : International Radiation Physics Society, 2012. Resumo.
  • NEIVA, A. C., et al. Analysis of photographs and photo-paintings by energy-dispersive x-ray fluorescence spectroscopy. In 2012 International Symposium on Radiation Physics - ISRP 2012, Rio, 2012. Proceedings of the 2012 International Symposium on Radiation Physics.Rio : International Radiation Physics Society, 2012. Resumo.
  • NEIVA, A. C., et al. EDXRF analysis of ceramic pieces of the collection of the Instituto Portucale. In LASMAC-2011 - 3rd Latin-American Symposium on Physical and Chemical Methods in Archaeology, Art and Cultural Heritage Conservation, Lima, 2011. Book of abstracs.Lima : Universidad Nacional Mayor de San Marcos, 2011. Resumo.
  • NEIVA, A. C., e Pinto, H P F. Considering selective corrosion in the interpretation of EDXRF results in bronze sculptures. In LASMAC-2011 - 3rd Latin-American Symposium on Physical and Chemical Methods in Archaeology, Art and Cultural Heritage Conservation, Lima, 2011. Book of abstracs.Lima : Universidad Nacional Mayor de San Marcos, 2011. Resumo.
  • Pinto, H P F, et al. Determining ppm contents of copper and zinc in biodiesel with energy-dispersive x-ray fluorescence spectroscopy. In 2012 International Symposium on Radiation Physics - ISRP 2012, Rio, 2012. Proceedings of the 2012 International Symposium on Radiation Physics.Rio : International Radiation Physics Society, 2012. Resumo.
Todos los derechos de la tesis/disertación pertenecen a los autores
CeTI-SC/STI
Biblioteca Digital de Tesis y Disertaciones de la USP. Copyright © 2001-2024. Todos los derechos reservados.